package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

/**
 * @author Zhou Yu
 */
@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Autowired
    private SystemUserService systemUserService;

    @Override
    public CaptchaVo getCaptcha() {
        // 创建验证码对象
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        // 设置生成验证码的类型
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        // 获取验证码
        String code = specCaptcha.text().toLowerCase();
        String image = specCaptcha.toBase64();
        // 设置Redis 的key
        String key = RedisConstant.ADMIN_LOGIN_PREFIX+ UUID.randomUUID();
        // 设置Redis 的value
        ValueOperations<String, String> opsForValue = stringRedisTemplate.opsForValue();
        opsForValue.set(key,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        return new CaptchaVo(image,key);
    }

    @Override
    public String login(LoginVo loginVo) {
        //1. 判断是否输入了验证码
        if (!StringUtils.hasText(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //2. 校验验证码
        ValueOperations<String, String> opsForValue = stringRedisTemplate.opsForValue();
        String code = opsForValue.get(loginVo.getCaptchaKey());
        if (code == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        if (!loginVo.getCaptchaCode().equalsIgnoreCase(code)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        //3. 校验用户是否存在
        String username = loginVo.getUsername();
        LambdaQueryWrapper<SystemUser> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SystemUser::getUsername,username);
        SystemUser systemUser = systemUserService.getOne(queryWrapper);
        if (systemUser == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        //4. 校验用户状态
        if (systemUser.getStatus() == null || systemUser.getStatus() == BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //5.校验密码是否正确
        String passwordByMd5 = DigestUtils.md5Hex(loginVo.getPassword());
        if (!systemUser.getPassword().equals(passwordByMd5)) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //6.创建并返回token
        return JwtUtil.createToken(systemUser.getId(),systemUser.getUsername());
    }

    @Override
    public SystemUserInfoVo getSystemUserInfoById(Long userId) {
        SystemUser systemUser = systemUserService.getById(userId);
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }
}
